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Fix for BUG#14662: view column in ORDER BY considered ambiguous if SELECT contains

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the same column as an aliased and as a non-aliased column.

The problem was that Item_direct_view_ref::eq() was first comparing view columns
by name, and in this case the name of one of them is different since it is aliased.


mysql-test/r/select.result:
  Added test for BUG#14662.
mysql-test/t/select.test:
  Added test for BUG#14662.
sql/item.cc:
  Changed the way view column refenreces are compared. Two view columns are
  equal if they resolve to the same result field of a view.
This commit is contained in:
unknown
2005-11-11 11:40:35 +02:00
parent 50ab764829
commit 9a0da055fd
3 changed files with 82 additions and 11 deletions
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42
mysql-test/r/select.result
View File

@ -3241,3 +3241,45 @@ f1 f2
Warnings:
Warning 1292 Incorrect date value: '2005-09-3a' for column 'f2' at row 1
drop table t1;
create table t1 (f1 int, f2 int);
insert into t1 values (1, 30), (2, 20), (3, 10);
create algorithm=merge view v1 as select f1, f2 from t1;
create algorithm=merge view v2 (f2, f1) as select f1, f2 from t1;
create algorithm=merge view v3 as select t1.f1 as f2, t1.f2 as f1 from t1;
select t1.f1 as x1, f1 from t1 order by t1.f1;
x1 f1
1 1
2 2
3 3
select v1.f1 as x1, f1 from v1 order by v1.f1;
x1 f1
1 1
2 2
3 3
select v2.f1 as x1, f1 from v2 order by v2.f1;
x1 f1
10 10
20 20
30 30
select v3.f1 as x1, f1 from v3 order by v3.f1;
x1 f1
10 10
20 20
30 30
select f1, f2, v1.f1 as x1 from v1 order by v1.f1;
f1 f2 x1
1 30 1
2 20 2
3 10 3
select f1, f2, v2.f1 as x1 from v2 order by v2.f1;
f1 f2 x1
10 3 10
20 2 20
30 1 30
select f1, f2, v3.f1 as x1 from v3 order by v3.f1;
f1 f2 x1
10 3 10
20 2 20
30 1 30
drop table t1;
drop view v1, v2, v3;

20
mysql-test/t/select.test
View File

@ -2729,3 +2729,23 @@ select * from t1 where f2 >= '2005-09-3a';
select * from t1 where f2 <= '2005-09-31';
select * from t1 where f2 <= '2005-09-3a';
drop table t1;
#
# Bug ##14662 ORDER BY on column of a view, with an alias of the same
# column causes ambiguous
#
create table t1 (f1 int, f2 int);
insert into t1 values (1, 30), (2, 20), (3, 10);
create algorithm=merge view v1 as select f1, f2 from t1;
create algorithm=merge view v2 (f2, f1) as select f1, f2 from t1;
create algorithm=merge view v3 as select t1.f1 as f2, t1.f2 as f1 from t1;
select t1.f1 as x1, f1 from t1 order by t1.f1;
select v1.f1 as x1, f1 from v1 order by v1.f1;
select v2.f1 as x1, f1 from v2 order by v2.f1;
select v3.f1 as x1, f1 from v3 order by v3.f1;
select f1, f2, v1.f1 as x1 from v1 order by v1.f1;
select f1, f2, v2.f1 as x1 from v2 order by v2.f1;
select f1, f2, v3.f1 as x1 from v3 order by v3.f1;
drop table t1;
drop view v1, v2, v3;